Device for reboring cylinders



July 7, 1925.

J. P. DRESP DEVICE FOR REBORING CYLINDERS Filed Dec, ,15. 1924 2 sheets-sheet Patented Julyv 7, 1925...

J'HN P. DRES?, 0F BEATRICE, NEBRASKA.

DEVICE Fon nEBonING cYLINDERs,"

Application filed December 15, 1924. Serial No. 756,015.

- To all/whom t may concern:

Be it known that I, JOHN P. Dnnsr, a citizen of' the United States, residing at Beatrice, -inthe county of Gage and State of Nebraska, have invented a new and vusev ful Device for Reboring Cylinders, of which the following is a specification.

This invention has referenceto a device especially designedfor use in reboring cylinders, the primary object of the invention being to provide a device of this character wherein 'the grinding elements may bead- ,`justed,\"adapt1ng the device for use 'in `connectionwith cylinders of variousdiameters.

Another object of the'invention is to provide 'a device of this character which will automatically center itself within the cylinder in which thesame is positioned to insure a true and even boring of the cylinder.

v" lith the foregoing' and other objects in view' which will appear as the description` proceeds, the invention resides in the combination and arrangement of parts and in -the details ofv construction hereinafter described and claimed, it being understood v that changesin the precise embodiment vof the invention herein disclosed, may be made `within they scope of what is claimed without departingfrom the spirit ofthe invention.

Referring to the drawings: Figure `1 isa side elevational view f of a reboring device-constructed in accordance with theinvention. v t lFigure 2 is a sectional view taken on line s 2-2 of Figure 1.

` Figure 3 is a'sectional view taken on liney l8 of Figure 1. 2; Figure 4: is a sectional viewtaken on line of Figure 1. p *Figure 5 is a sectional view 5`5of Figure 3.

Figure 6 is a sectional view taken on line 6+6of Figure 1.

Referring to the drawings in detail, the device includes a central supporting section'5 which is supplied with laterally ex.- tending. supporting rods 6 arranged in parallel relation with each other and disposed adjacent to the ends o f the supporting section 5.

Arranged adjacent to the rods 6 and disposed slightly above the rods 6 are the supporting rods 7 that extend in directions at right angles to the rods 6, as clcarlyshown by Figurev 1 of the drawings. y l 'Mounted on the rods 6 and 7 are the adtaken on line end portions 9 that have openings. to accommodate the rods 6 and. 7 so that the supn porting members will be connected withl the centralr supporting section' 5 in a manner to permit of lateral movement ofthe supporting members but. restrict vertical movement thereof with respect to the supporting section 5. l

i Formed integral withl each supporting section and extending inwardly therefrom, is a rib 1() which is formed with an inclined surface 11 that lengages the expanding member 12, which is substantially inverted coneshaped, in such a way that as the expanding v justable supports 8 which are formedr with coA member 12 moves, the supporting members will be moved laterally by their contact with the expanding member 12.

' penings are formed in the ribs 10 and accommodate the coiled spring member 13 y which is designed to normally hold the supporting members inwardly sothat the -inclined edges of the ribs 10 will expanding member at all times.

This expanding memberlis formed with a central opening so that it may be positioned on the central supporting section in a manner to. move longitudinallyT thereover, the expandingmember being provided with a threaded opening to accommodate the a'd- Justing screw 141 that has its upper` end positioned in the retaining member 15, the retaining member lbeing suppliedwith a suitablel mark to cooperate withv the markings shown o-n the head 16 of the adjusting screw 14 so. that movementl of the adjusting screw to accomplish the adjustment of the standing member, may be made with a degreeof accuracy. y p

The supports 8 are formed-with cutout engage the' portions disposed throughout their lengths,

to accommodate the boring elements 17 which may be secured in the cut out portion by means such as solder or the like. While I have shown and described means'such as solder, it is to be understood that any suitable securing means may be employed for A securing the boring members withinthe supporting members.

A universal joint indicated at 18 connects thc rod 19 with the central supporting secf.

tion 5 and affords means whereby suitable power may be ap lied to rotate the supports within the cylin er. V

In the usef'of the device, the device is po- -sitioned in a cylinder to be rebored and the -ing laterally from the central support-l ingseotion, boring element supports having enlarged end portions, said end portions'having openings toaccOInmodate the supporting rods, ribs carried by the supports, said ribs having beveled inner surfaces, an expanding cone mounted for movement longitudinally of the central supporting member and adaptedv to engage the beveled inner surfaces of the ribs to move the supports laterally, means for moving the cone, and

means for normally holding the sections into close engagement with the tone.

2. A reboring device including a central supporting section, supporting rods extend ing laterally from the supporting section, boring element supports, said supports having enlarged end portions having openings to accommodate --the supporting rods, ribs having beveled surfaces, secured to the supports, said ribs having openings disposedsubstantially centrally thereof and extending transversely therethrough, a coiled spring extending through the openings of the ribs for connecting the ribs, an adjusting cone movable along the support and adapted to engage the ribs for moving the supports laterally, means for moving the adjusting cone,

and boring members carried by the supports.

In testimony that I' claim the foregoing' as my own, I have hereto aflxed my signature in the presence of two witnesses.v

\ A JOHN P." nnnsr.r I

Witnesses:

M. E. Dorn, Trios. L. ADAMS. 

